<nav class="navbar navbar-default">
    <div class="container-fluid">
        <!-- Brand and toggle get grouped for better mobile display -->
        <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse"
                    data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="#">Brand</a>
        </div>

        <!-- Collect the nav links, forms, and other content for toggling -->
        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
            <ul class="nav navbar-nav">
                <li><a href="{% url 'main:index' %}">首页</a></li>
                <li class="dropdown">
                    <a href="{% url 'main:category' 1 %}">分类 <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        {% for t in ts %}
                        <li><a href="{% url 'main:theme' 1 t.id %}">{{ t.title }}</a></li>
                        {% endfor %}

                    </ul>
                </li>
                <li class="dropdown">
                    <a href="{% url 'main:category' 2 %}">排行榜 <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        {% for tt in tts %}
                        <li><a href="{% url 'main:theme' 2 tt.id %}">{{ tt.title }}</a></li>
                        {% endfor %}
                    </ul>
                </li>

            </ul>
            <form method="get" action="/search" class="navbar-form navbar-left">
                <div class="form-group">
                    <input name="q" type="text" class="form-control" placeholder="Search">
                </div>
                <button type="submit" class="btn btn-default">搜索</button>
            </form>
            <ul class="nav navbar-nav navbar-right">
                {% if request.user.is_authenticated %}
                <li class="dropdown">
                    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
                       aria-expanded="false">{{ request.user.username }} <span class="caret"></span></a>
                    <ul class="dropdown-menu">
                        <li><a href="#">个人中心</a></li>
                        <li role="separator" class="divider"></li>
                        <li><a href="{% url 'user:logout' %}">退出</a></li>
                    </ul>
                </li>
                {% else %}
                <li><a href="{% url 'user:login' %}">登录</a></li>
                <li><a href="{% url 'user:register' %}">注册</a></li>
                {% endif %}
            </ul>
        </div><!-- /.navbar-collapse -->
    </div><!-- /.container-fluid -->
</nav>




